xref: /illumos-gate/usr/src/lib/libumem/common/umem.h (revision 14702342)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef _UMEM_H
28 #define	_UMEM_H
29 
30 #include <sys/types.h>
31 #include <sys/vmem.h>
32 #include <stdlib.h>
33 
34 #ifdef	__cplusplus
35 extern "C" {
36 #endif
37 
38 #define	UMEM_DEFAULT	0x0000	/* normal -- may fail */
39 #define	UMEM_NOFAIL	0x0100	/* Never fails -- may call exit(2) */
40 
41 #define	UMEM_FLAGS	0xffff	/* all settable umem flags */
42 
43 extern void *umem_alloc(size_t, int);
44 extern void *umem_alloc_align(size_t, size_t, int);
45 extern void *umem_zalloc(size_t, int);
46 extern void umem_free(void *, size_t);
47 extern void umem_free_align(void *, size_t);
48 
49 /*
50  * Flags for umem_cache_create()
51  */
52 #define	UMC_NOTOUCH	0x00010000
53 #define	UMC_NODEBUG	0x00020000
54 #define	UMC_NOMAGAZINE	0x00040000
55 #define	UMC_NOHASH	0x00080000
56 
57 struct umem_cache;		/* cache structure is opaque to umem clients */
58 
59 typedef struct umem_cache umem_cache_t;
60 typedef int umem_constructor_t(void *, void *, int);
61 typedef void umem_destructor_t(void *, void *);
62 typedef void umem_reclaim_t(void *);
63 
64 typedef int umem_nofail_callback_t(void);
65 #define	UMEM_CALLBACK_RETRY		0
66 #define	UMEM_CALLBACK_EXIT(status)	(0x100 | ((status) & 0xFF))
67 
68 extern void umem_nofail_callback(umem_nofail_callback_t *);
69 
70 extern umem_cache_t *umem_cache_create(char *, size_t,
71     size_t, umem_constructor_t *, umem_destructor_t *, umem_reclaim_t *,
72     void *, vmem_t *, int);
73 extern void umem_cache_destroy(umem_cache_t *);
74 
75 extern void *umem_cache_alloc(umem_cache_t *, int);
76 extern void umem_cache_free(umem_cache_t *, void *);
77 
78 extern void umem_reap(void);
79 
80 extern void umem_setmtbf(uint32_t);
81 
82 #ifdef	__cplusplus
83 }
84 #endif
85 
86 #endif	/* _UMEM_H */
87